Abrading.



J. B. LADD.

ABRADING. APPLICATIONFILED APR.2. 1915.

l 11 1 3% Patented Sept. 12, 1916.

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witnesses:

J. B. LADD.

ABRADING.

I APPLICATION FILED APR.2, 19I5. 1 19&1%1 PatentedSepn 12,1916.

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In zw/zfar 0 /5. AM f? WM M J. B. LADD.

ABRADING.

A PLICATION FILED APR. 2, 1915.

Patented Sept. 12, 1916:

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Inverztar JAMES B. LADD, F ARDMORE, PENNSYLVANIA, ASSIGNOR '10 BALTIMORE TUBE COMPANY, INCORPORATED, 0F BALTIMORE, MARYLAND, A CORPORATION OF VIRGINIA.

ABRADING.

Specificatiers Patent. Patteentjtetll Sept. 112, 19115..

Application filed April 2, 1915. Serial No. 18,637.

i To all whom it may concern Be it known that 1, JAM S B. LADD, a citizen of the United States, residing at Ardmore, in the county of Montgomery, State of Pennsylvania, have invented a new and useful Abrading, of which the following is a specification.

My invention relates to improvements in method and means for abrading.

The object is to provide improved method and means for abrading or polishing the surfacesof metal tubes or other stock.

The invention comprises longitudinal and rotative movement of the stock relatively to the moving abrading surfaces.

The invention comprises the movement of oppositely disposed abrasive surfaces inopposite directions and insuring eflicient engagement of said abrading surfaces with the surface of the stock to be operated upon.

The invention is adapted for continuous and automatic operation, and also comprises method and means for adjusting the various elements to suit the requirements of different dimensions, etc. of the stock operated upon.

Referring to the drawings, which illustrate merely by way of example, suitable means for effecting my invention-Figure 1 is a plan view. Fig. 2 is a horizontal section on line 2-2 of Fig. 3. Fig. 3 is a longitudinal vertical section on line 3-3 of Fig. 1. Fig. 4 is a longitudinal section, on a slightly enlarged scale, on line 4-4 of Fig. 1. Fig. 5 is the feed end elevation. Fig. 6 is the discharge end elevation. t Fig. 7 is a detail in plan showing the presser rollers .and associated mechanism. Fig. 8 is a section on line 88 of Fig. 7. Fig. 9 is a front elevation of the feeding head on an enlarged scale, part broken away. Fig. 10 is a sec tion on line 10'10 of Fig. 9. Fig. 11 is a section on line 11-11 of Fig. 9. Fig. 12 is a fragmentary section showing the interchangeable and adjustable pinions. Fig. 13 is a face view of the pinio-ns shown in Fig. 12.

Similar numerals refer to similar parts throughout the several views.

The belt- 16 is mounted on the wheels or pulleys 18 and 19. The belt 17 is mounted is longitudinally,adjustable in the framework 26; such adjustment being controlled by the screw 27, for the purpose of maintaining the belt under proper tension. The framework 26 is mounted on the ll-beams 28 and 29 and has a lateral movement thereon; such movement is caused by means of the threaded rods 30 and 31 operated by the hand wheels 32 and 33. The said rods are connected together by the sprocket chain 34 to secure simultaneous actuation. It will be understood that these threaded rods 30 and 31 are provided with right hand and left hand threads in order to move the frames 26 and 26 to or away fromeach other, to bring the abrasive belts 16 and 17 into proper relative position with respect to size of the stock to be operated upon.

To the lower end of shaft 23 is secured the pulley 35, connected by belt 36, with pulley 37, which is connected with pulley 38 driven from any suitable source of power, not shown. From an inspection of Fig. 2 it will be seen that the pulleys 19 and,21 are each driven in the same direction, the adjacent abradingbelt portions are driven in opposite directions, that is, the portions of the belts engaging the stock move in opposite directions, or by changing the method of drlving the belts may be made to travel in the same direction. In order to secure the efficient engagem nt with the stock by the two belts throughout their entire extension between their respective pulleys, a series of presser rollers 39 are provided. Each of these rollers is mounted on .a bell lever 40 pivotally mounted at 41 and having its free end 42 engaged by the spring 43 which serves to actuate the presser roller to maintain the belt in efficient engagement with the stock to be operated upon. The shoulder or lug 43 is adapted to engage the end of lever 42 to limit its spring actuated movement. It will also be noted from an inspection of Fig. 4 that these presser rollers are maintained in substantially horizontal alinement,

that is, engaging the belt near its upper edge tion may be a practically continuous operamounted the pinion 55.

meshes w1th the annular rack 56 mounted onstructure 53.

contact with the at one end, being the discharge end, and

near its lower edge at the other end, which is the feed end; this being substantially the line of contact between the stock and the belt. It will be observed that the two belts are supported in position inclined to the horizontal, so that the stock, which moves horizontally, will engage with the entire surfaces of the belts during its travel between the same, as will readily be understood.

The rollers 44 and 45, mounted on the brackets 46 and 47 serve to counteract any tendency of the belt to ride upwardly from the pulleys 20 and21, due to the engagement of thesame with the stock at an angle therewith, and 44 and 45 in like manner serve to counteract any downwardly.

As an example of the stock to be operated upon I have shown aseries of metallic tubes. Theseare joined together by'inserting short tubes iii abutting ends, so that the operathe stationary housin 48. The pinion meshes with pinion 5 see Fig. 13, whichcarries on the lower end of its shaft the spiral gear 58. This spiral gear 58 meshes with spiral gear 59, see Fig. 9, which is mounted on the shaft of the right and left hand worm 60. This right and lefthand worm 6O meshes with the worm gears 61 and 62. Worm gears 61 and 62 are mounted on spindles upon which are secured the rollers 63 and 64. These rollers are provided with annular grooves to fit the periphery of the stock operated upon, and are either made of i rubb er or provided with a peripheral surface of rubber to give anefiective gripping stock to be operated upor These rollers 63 and 64 are mounted in frames slidable in the rotating structure 53 and are operated by the right hand and left hand screw to move the rollers toward or away from each other, to fit the size of'the stock to be operated upon. The pinion 55 is 'mounted on a stud adjustably secured in an arc-shaped slot 66,'the arc'being that ofa fat , I circle whose center is the center of movement 60 of ,the frame 53.- The pinion 57 is interchangeable with other pinions of different diameter, and the pinion 55 has the-adjustable movement in order to bring it in mesh with such differing diameter of pinion. It willbe understood that whatever the positendency of the belt to ride ing and abrading mechanisms shall have a relative speed of movement. Upon the ro-,

tation of pinion 51 engaging with rack 52, the frame 53 is rotated and consequently the pinion 55 meshing with the fixed rack 56 is caused to rotate thereby giving rotative movement to pinion 57 and spiral gear 58, which in turn communicates movement to the spiral gear 59 and the worms 60. The worms 60 are right and left hand Worms so that they communicate movement to the wormgears 61 and 62, and corresponding movement to the rubber faced rollers 63 and 64. The relative speed between the movement of the rollers 63 and 64, and the rotating movement of the movable frame or housing 53, is secured by deter- .mini'ng the diameter of the pinion 57. It.

will-therefore be seen that as the tube or other stock is carried forward between the rollers 63 and 64, it is also giving a rotative movement about its axis. As the tube or series of tubes are carried forward to and away from the abrading mechanism, they are supported on the rollers 68. These rollers are mounted on bars 69. These bars 69 are provided with vertical extensions suitably guidedon the stationary framework, and are supported on the bell levers 70 mounted in the stationary framework. The lower ends of these bell levers are all connected with the rod 71 having a threaded portion operated by the hand wheel 73 to give it a longitudinalmovement in one direction orthe other to cause the elevation or lowering of the roller 68 as required. The bar 74 extends between the abrading belts and is provided with the down-turned ends 75, working in suitable guides in the stationary framework. This bar is supported on the bell levers 79. These levers are also connected with the common actuating rod 71. This rod 71 is adapted to support a number of wooden saddles as shown in Fig. 8. These saddles are interchangeable; so that the required size may be used to suit the size of stock operated upon. Between the saddles 80 are secured spacing blocks, of the same width as the bar 74, merely to maintain the saddle in proper position.

By the use of the word "stock, in the following claims, I mean to include any-body of material whether hollow or solid, the

.surface of which is adapted to be operated upon by the abrading trated and described.

I have stated, merely as a specific exmeans herein illusample, that the several tubes are joined together by inserting short tubes in the abutting ends thereof. It will beunderstood, however, that such other means may be employed for securing together the several units of stock to be operated upon, as circumstances may require.

While it have shown the abrading belts inclined to the horizontal, it is obvious that the same result is gained so long as the longitudinal movement of the stock is in a line inclinedto the path of travel of said abrading belts.

While I have shown one feeding head, adapted to feed the stock to the abrading belts, it may under some circumstances be desirable to, place another feeding head at the o'ther'end of the abrading belts, further to control the movement of the stock. In certain cases it may be desirable to place blocks, similar to block 80, or other guiding devices, above the stock between the abrading belts, further to control its movement, or to maintain the same in the required path of travel.

What I claim is 1. The combination of a belt having an abrasive surface, supporting rollers and actuating means therefor, and means for supporting, and moving stock in the required path of travel in contact with said abrasive surface simultaneously throughout the greater portion of its longitudinal extension from roller vto roller in a direction inclined to the path of travel of said elt.

2. The combination of a pair of belts having abrasive surfaces, supporting pulleys for said belts so positioned as to maintain the oppositely disposed abrasive surfaces parallel and inclined to the axis of the stock, and means for supporting and moving stock between said parallel abrasive surfaces.

8. The combination of a pair of belts having abrasive surfaces, supporting pulleys for said belts so positioned as to maintain the oppositely disposed abrasive surfaces parallel and inclined to the horizontal, and means for supporting and moving stock between said parallel abrasivesurfaces, and in contact with each belt throughout its extension from pulley to pulley.

4t. The combination of a pair of belts having abrasive surfaces, supporting pulleys for said belts so positioned as to maintain the oppositely disposed abrasive surfaces par allel and inclined to the longitudinal extension of the stock, and means for supporting and moving stock both horizontally and axially between said parallel abrasive sur faces. r

5. The combination of a pair of belts having abrasive surfaces, supporting pulleys for said belts so positioned as, to maintain the oppositely disposed abrasive surfaces parallel and inclined to the longitudinal extension of the stock, means for supporting and moving stock between said parallel abrasive surfaces, and means for exerting pressure said belts so positioned as to maintain the oppositely disposed abrasive surfaces parallel and inclined tothe longitudinal extension of the stock, means for supporting and moving stock between said parallel abrasive surfaces, and means foradjusting the distance between the oppositely disposed abrasive surfaces. I

7 The combination of means for supporting and moving stock in the required path of travel, a belt having a surface provided with abrasive material, supporting and actuating pulleys therefor positioned so that the abrasive surface shall engage the surface of the stock throughout the greater part of belt extension from pulley to pulley, and means for raising and lowering the stock supportating pulleys therefor positioned so that the abrasive surface shall engage the surface of the stock, throughout the greater part of belt extension from pulley to pulley, and means for adjusting the stock actuating means to fit the different dimensions of the stock operated upon.

9. Means for feeding stock comprising a fixed housing and a body rotatably mounted therein, a pinion mounted in the fixed housing adapted to be driven from a suitable source of power, an annular rack secured to the rotatable body and meshing with the pinion, a pair of stockengaging rollers pro vided with annular grooves adjustably mounted on parallel. axes in the body, an annular rack on the fixed housing near the outer margin thereof, a pinion mounted on the rotatable body meshing with said rack, and a train of gears from said pinion to the rollers.

10. In combination with abrading mechanism, supporting rollers for the stock,

actuating means for the bell cranks for raising and lower the frames.

11. In combination with abrading means, a stock supporting bar, means for raising and lowering the same, and interchangeable saddle blocks adapted to be mounted on the bar for engaging stock of different dimensions.

12. Tn combination with abrading means,

a stock supporting bar, means for raising and lowering the same, and interchangeable saddle blocks adapted to be mounted on the bar for engaging stock of different dimensions, and spacing pieces between said saddle blocks.

18. The combination of a belt having an abrasive surface, supporting rollers and said belt, and means for joining separate units of stock together to facilitate'in feeding the same.

14. The combination of a pair of belts 'having abrasive surfaces, supportingv pulleys for said belts so ositioned as to maintain the oppositely dlsposed abrasive surfaces parallel and inclined to the axis of the stock,

and means for supporting and moving stock between said. parallel abrasive surfaces, and

means for joining separate units of stock together to facilitate in feeding the same.

JAMES B. LADD.v Witnesses:

' Ron'r. NEILSON,

C. H. YATES. 

